public static String toJSONStringIgnoreTransient(Object object) {
        SerializeWriter out = new SerializeWriter();
        try {
            JSONSerializer serializer = new JSONSerializer(out);
            serializer.config(SerializerFeature.SkipTransientField,false);
            serializer.write(object);
            return out.toString();
        } finally {
            out.close();
        }
    }

Google 和 百度了好久都没有找到的答案,为以后需要的同学看